USGS 8830, Threemile Cove, Gravina Island (Triassic of the United States)

Also known as G.C.M.-2

Where: Alaska (55.2° N, 131.8° W: paleocoordinates 0.1° S, 70.9° W)

• coordinate based on nearby landmark

When: Lacian (221.5 - 215.6 Ma)

Environment/lithology: lithified limestone

Size class: macrofossils

Collected by Martin and Overbeck

Primary reference: J. P. Smith. 1927. Upper Triassic marine invertebrate faunas of North America. United States Geological Survey Professional Paper 141:1-262 [D. Bottjer/C. Powers/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 112234: authorized by Arnold Miller, entered by Sarah Kolbe on 07.07.2011, edited by Catherine Powers

Creative Commons license: CC BY (attribution)

Taxonomic list

• Identified by T.W. Stanton.
Show authors, comments, and common names
Cephalopoda
 Ceratitida - Arcestidae
? Arcestes sp.
? Arcestes sp. Suess 1865 ceratite
Gastropoda
 Pseudomelanoidea - Pseudomelaniidae
? Pseudomelania sp.
? Pseudomelania sp. Pictet and Campiche 1862 snail
Bivalvia
 Ostreida - Ostreidae
? Ostrea sp.
? Ostrea sp. Linnaeus 1758 oyster
Anthozoa
 Scleractinia - Pamiroseriidae
""Astrocoenia" martini" = Ceriostella martini
""Astrocoenia" martini" = Ceriostella martini Smith 1927 stony coral